crop or add black borders to the picture to make it compliant.
==== 11.8.1.1. Format Constraints ====... utput format. Using these options we can instruct it to create the correct type of file.
The options ... sync with other muxers such as MPEG. This is why it is necessary to append the harddup video filter a... ormats, but players often have no problem playing it anyway.
* abitrate: 224 for VCD; up to 384 for
